Drill post



A. M. STATEN June 22, 1937.

DRILL POST Filed July 31, 1936 ATTORNEY$ Patented June 22, 1937 UNITED eATENT OFFICE 5 Claims.

The object of the invention is to provide a drill post particularly adapted for use in mines and so equipped that it may be readily secured to the floor and ceiling of the mine as to be 5 turned on a vertical axis to secure the most effective position for the drill in penetrating the wall in which a hole or opening is to be made; to provide a drill post that provides a mounting for the drill so that the latter may be swung angularly in a vertical plane, or initially positioned to secure its. most convenient height; to provide a drill post in which, in the setting up operation, the initial adjustments are manually made and the setting of the post into final position effected by means of a toggle action due to the peculiar assemblage of the parts; and generally to provide a drill post which is of simple form, susceptible of cheap manufacture, and of a construction permitting its: use under the most exacting conditions without liability of disarrangement or damage of its parts.

With this object in view, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated 25 in the accompanying drawing, wherein:

Figure l is a perspective View of the invention, showing the latter applied in operative position, the walls of the mine being indicated in section.

Figure 2 is a longitudinal sectional view of the post, showing the position of the parts in the setting up operation.

Figure 3 is a sectional view on the plane indicated by the line 3-3 of Figure 2.

Figure 4 is a sectional view on the plane indicated by the line d4 of Figure 1.

Figure 5 is a sectional view on the plane indicated by the line 55 of Figure 4.

The essential elements of the post are the celling and floor spurs ill and H and the body bar which is composed of spaced legs 12 which, at their upper ends are integrally connected by a web l3 which constitutes a thrust web in which the ceiling spur i0 is mounted; the latter be- 45 ing externally threaded as indicated at M to engage a correspondingly formed hole in the thrust web l3. A lateral handle or stud i5 is mounted in the ceiling spur to provide a means for the longitudinal adjustment of the spur and thrust web by reason of making it possible to turn the spur by means of the handle or stud E5.

The floor spur i i extends through and is slidably mounted in a cross-head l6 which is preferably angular or square in plan and dimensioned 55 to span the legs l2 at the bottom, the cross-head being provided with trunnions H which extend through holes or bearings in the legs l2 and re ceive exterior to the latter the nuts l8 and washers l9 which are interposed between the legs 52 and the nuts. This arrangement not only 5 provides for maintaining the spaced relation of the legs at the bottoms but also provides a rocking mounting for the cross-head E5.

The spur H, at the upper end carries a head member which has a. blind bore in which the upper end of the spur is received, the head being removably attached to the spur by means of a set screw 2! with a winged head for hand turning and a tapered pilot to enter a correspondingly formed socket in the spur.

On diametrically opposite sides, the head is provided with radial posts 22 for selective engagement in the closed and opened seats 23 and 24, the seats 23 consisting of a series of blind holes formed in the inner face of one of the legs l2 and the open seats consisting of slots 24 in the inner face of the opposite leg, one slot 2 being opposite each hole 23. Each of the legs, for the length of the complements of holes and slots is thickened as indicated at 25 to provide 25 shoulders against which the posts 22 may bear when the posts 22 are in spur retaining position.

In the setting up operation of the device, the spur I0 is initially adjusted so that it will dig into the ceiling when the spur will similarly engage the floor if the posts 22 are, say, in the uppermost hole 23 and slot 24. The parts are then set up as indicated in Figure 2, when the spur l I will be at an angle to the body bar and both at angles to the vertical. Then one post 22 is inserted in an appropriate socket or hole 23, and the other post forced into the associated slot 2 1, this action turning the spur II on its own axis but at the same time forcing the spur and body bar into alignment. In other words, a toggle action is effected by the particular relation of the parts and the two spurs are caused to dig into the celling and floor surfaces which results in anchoring the post securely. The cross-head l6 rocks in this operation and when the two posts 22 have been set in their respective socket and slot, the set screw 26 is tightened, this set screw being mounted in one edge of the cross-head I6 and arranged to bear upon the spur, so that that is then looked against turning and thus the head 20 is retained in its position in the body bar.

The drill 27 is carried in an appropriate socket at the end of an externally threaded drill stem 28 which is mounted in an internally threaded collar 29 formed with diametrically disposed radial studs 38, these studs constituting the mounting means for the collar at any point in the height of the legs l2 of the body bar, since the latter are slotted on one edge as indicated at 3| to provide complemental series of slots forming seats for the studs. This arrangement provides for locking the collar to swing the drill in a vertical plane, so that the hole may be drilled angularly upward, downward or directly horizontal, the drill being fed by reason of the screw connection between the stem and the collar and turning movement being imparted through the instrumentality of the crank 32 with which the stem is terminally equipped.

The invention having been described, what is claimed as new and useful is:

1. A mine drill post comprising a body bar and spurs mounted at the remote ends of the bar, the bar at one end being provided with a pivotally mounted cross-head through which the associated spur extends, the upper end of the spur overlapping the bar and the latter and the spur being provided with cooperating means to impart turn ing movement to the spur without axial movement and thereby rock the cross-head and align the bar and spur by a toggle joint action.

2. A mine drill post comprising a body bar, a spur carried at one end thereof, a second spur mounted at the remote end, a swivelly mounted cross-head in which the second spur is mounted at an intermediate point, so that a portion overlaps the body bar, a head carried by the spur on the overlapping portion, the head being formed with diametrically disposed spurs, the body bar having oppositely disposed seats in which said spurs may engage.

3. A mine drill post comprising a body bar, a spur mounted at one end thereof, a second spur carried at the opposite end, a pivotally mounted cross-head carried by the bar with which said second spur has a sliding connection with one portion overlapping the body bar, the body bar being formed with two series of spaced seats arranged in pairs of oppositely disposed seats of which one is closed and the other open, and a head carried by the overlapping portion of the second spur and provided with diametrically disposed studs selectively engageable in any pair of seats by first positioning one stud in a closed seat and forcing the other into the open seat, thereby rotating the spur on its own axis.

4. A mine drill post comprising a body bar, a spur mounted at one end thereof, a second spur carried at the opposite end, a pivotally mounted cross-head carried by the bar with which said second spur has a sliding connection with one portion overlapping the body bar, the body bar being formed with two series of spaced seats arranged in pairs of oppositely disposed seats of which one is closed and the other open, and a head carried by the overlapping portion of the second spur and provided with diametrically disposed studs selectively engageable in any pair of seats by first positioning one stud in a closed seat and forcing the other into the open seat, thereby rotating the spur on its own axis, and a set screw carried by the cross head to engage the spur and prevent axial rotation when the posts are engaged in their seats.

5. A mine drill post comprising a body bar composed of spaced legs connected at their upper ends by a thrust web, an axially adjustable spur mounted in said thrust web, a cross-head spanning the legs or" the body bar at the end remote from the thrust Web, and having trunnions constituting pivotal mountings for the cross-head, a second spur carried by the cross-head and extending beyond the latter to overlap the body bar, and means carried by the overlapping portion of the spur to engage the body bar to force it and the spur into alignment by toggle joint function in mounting the post.

ALLEN M. STATEN. 

